Magneto-electric generator for signaling purposes



(ModeL) J. G. ARNOLD.

MAGNETO ELECTRIC GENERATOR FOR SIGNALING PURPOSES.

No. 256,189. Patented Apr. 11,1882.

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UNITED STATES PATENT OFFICE.

JAMESG. ARNOLD, OF WORCESTER, MASSACHUSETTS.

MAGNETO-ELECTRIC GENERATOR FOR SIGNALING PUliPOSES.

SPECIFICATION forming part of Letters Patent No. 256,189, dated April 11, 1882,

Application filed July 11, 1881.

To all whom ti may concern:

Be it known that I, JAMEs G. ARNOLD, of the city and county of \Vo'rce ster, State of Massachusetts, have invented certain new and useful Improvements in Magneto-Electric Generators and Mechanism for Driving the Same, of which the following is a specification.

My invention relates to that class of generators in which the current is induced in coilsrevolved near or between the poles of magnets, though applicablein parts to other mechanisms.

The object of my invention is to produce a simple, easily-operated generator whose work shall be equal, or very nearly so, under the operation of different persons, so that the strength I of its currents shall always be practically the same; and also to provide against side wear of the coil-carrying arbor and reduce its friction by doingaway with all side thrust or pressure; and also to reduce the circle of motion of the revolving coils to insure rapidity of motion 5 and also to provide a simple automatic index to show the direction of operative motion. I accomplish these objects, first, by the use of a spring operating mechanism which receives the action of the operator and stores it up, as it were, until the desired amount of force is reached, when it transfers it to the operating parts and gives the desired current; secondly,

by the manner of belting or driving the coilcarrying arbor; thirdly, by the peculiar construction of the parts holding the coils; and, fourthly, by an automatic device moving an arrow or pointer, so that it always points in the right direction.

The accompanying drawings show the operating parts of a magneto-electric generator embodying my invention.

Figure 1 is a top view. Fig. 2 shows the interior with the top removed. Fig. 3 shows a side view with the side and one magnet removed. Figs. 4 and 5 show some parts in detail. Figs. 6 and 7 show some variations of parts, hereinafter more particularly described.

M M are the magnets, of the common horseshoe form, placed with their alternate poles adjacent,

K K are the coils, connected together and through their pivots P Q, respectively, to the binding-posts U U by spring bearing connections in the usual way, the cores of the coils (Modeh) K K very nearly filling the space between the poles of the magnets, as shown in Fig. 3. The coil-carrier is shown in Fig. 4, the pieces It It being of any suitable insulating material and connected by the pieces P Q, to the pivots P Q, forming a frame or yoke, allowing the coils to be placed close together, as in Fig. 5, to be retained by a band secured to It It or other suitable means, and when one coil is sufiicient the yoke is made as in Fig. 6, which is the same as Fig. 4. with the part to thelei't 0f the line a; y left off. In either form the heads or coils are made to give room for the pieces I Q, where they project over them.

The driving'pivot P is made square to receive the pulley I, which is held thereon by a washer and the screw 0, the latter having a suitable head for connecting-spring L to bear on. The pulley I is held and driven on three sides by the wheels J J and G by the band 11 surroundingthem. ThewheelsJJ,1-unningon studs on the swinging armsjj, give the full pressure of the belt to the pulley I, holding it to Gr, and by grooving the three driving-pulleys and making I to correspond after the manner of friction-drivers the latter will be held bothcentrallyandlaterallybytheothers,so that the pivot P needs no othersupport asjournal or collar and the pivot Q only a simple hearing near its end, as in Fig. 3.

In Fig. 7 is shown a manner of driving the pulley l by belting, using only one extra driver, J, and the pulleys are all grooved, either single or double, and either two belts may be used or one with guides, and by a crank on wheel G it will be seen that the pulley I can be given a continuous rotation with very little or no side pressure. This form of crank may be applied to pulley G, Figs. 2 and 3, making that into a crank machine by leaving 011' its spring motion. Said spring motion consists of the adj ustable spring E, connected to piece 0, which is loosely pivoted to the shaft of wheel G, and any suitable means for turning the piece 0 half round and back alternately, the piece 0 giving motion to the wheel Gr by contact with pin F of its two arms alternately. B is a plate pivoted on the outside of the top of the box A, (or its front when put up for operation,) and having a pin, B, working in the curved slot shown in broken lines, and projecting inside far enough to operate the piece 0. At 1) is a knob or handle attached to the plate B and earryin g the pivoted arrow I), having its feather end weighted to make it hang down, whereby, when the machine is placed in working position, (with the left-hand end of Figs. 1, 2, and 3 up,) the arrow will always point in the direction that the knob I) should be moved when it is at rest at either end of its motion, or near there.

At 0 is an adjusting screw and nut, whereby the tension and force of spring E may be increased or diminished at will.

'In operation, on moving the knob 12, as indicated by its arrow, it moves the piece 0, through the pin B, to position shown in broken lines in Fig.2,bendi1'ig spring E to E,

and when its connection D passes a little beyond the center of G, as shown, the force stored up in spring E is expended in turning the piece (3 to the position shown in full line in Fig. 2, thus turning the wheel G one-half a turn or a little more, giving motion to band H. and pulleys J J and I.

It will be seen that the work of the operator is received by the spring, and little or no motion is given to the wheel Gr until the connection D passes over its center, when the spring starts the piece (J away from pin B, leaving that stationary, while the spring runs the machine. Thus whether theknobis givena quick or slow motion the action of the spring is practically the same, giving the same velocity and number of turns to the coils, and consequently the same strength of current from them,which may be varied by the adjusting-nut on the screw 0.

AtV is a switch-spring for making a short circuit through spring E, if wanted, (that will be broken by the first motion of spring E and restored after its action in each operation,) by connections readily located by any one versed in the art.

The application of the spring driving mechanism enables the machine to be adjusted to always give the same stroke or call, and a number of machines to be so adjusted that each call shall be different from all the others, and by substituting a crank giving rotary motion to the wheel Gr a powerful machine is produced, and other numerous advantages of its peculiar construction, as described, are deemed sutlieiently obvious not to need further description here.

What I claim as new and desire to patent is- 1. In a magneto-electric generator, the combination of a coil or coils with their frame or carrier, constructed substantially as described, whereby the coils may be brought close to their center of motion, or a single coil made to approximately coincide with its center of motion.

2. In a magneto-electric machine, the combination of the driven pulley I with the three grooved driving'wheels and their belt, whereby it is held against displacement both laterally and longitudinally, substantially as set forth.

3. The combination of a magneto-electric machine with the adjustable spring E, connected tilting piece 0, operating on pin 11 of driving-wheel G, constituting a driving mechanism capable of adjustment to give definite velocity to the machine irrespective of the rapidity of the operators action, and the operating-plate B, having a pin, B, whereby the said mechanism can be brought into action, substantially as and for the purposes described.

4. The combination of the adjustable spring a E and connected tilting piece 0 with the magneto-electric or other machine, for giving repeated movements of the same force, substantially as set forth.

5. The combination of spring E, connected piece 0, and the operating-plate B, or its equivalent, substantially as and for the purposes described.

(3. In amagneto-eleetrie machine, the combination of the partially-revolving plate 13 with the automatic indicator, substantially as above set forth.

JAS. G. ARNOLD.

Witnesses:

Geo. SWAN, REUBEN SWAN. 

